<template>
  <div class="department-container">
    <div class="app-container">
      <!-- 头部 -->
      <el-card>
        <!-- 用一个行列布局 -->
        <el-row
          type="flex"
          justify="space-between"
          align="middle"
          style="height: 40px"
        >
          <el-col :span="20">
            <svg-icon icon-class="home" /><span>江苏传智播客教育科技股份有限公司</span>
          </el-col>
          <el-col :span="4">
            <el-row type="flex" justify="end">
              <!-- 两个内容 -->
              <el-col>负责人</el-col>
              <!-- 下拉菜单 element -->
              <el-col>
                <el-dropdown>
                  <span> 操作<i class="el-icon-arrow-down" /> </span>
                  <el-dropdown-menu slot="dropdown">
                    <el-dropdown-item
                      @click.native="hAdd('')"
                    >添加子部门</el-dropdown-item>
                  </el-dropdown-menu>
                </el-dropdown>
              </el-col>
            </el-row>
          </el-col>
        </el-row>
        <!-- 树形结构的部门数据 -->
        <el-tree :data="list" :default-expand-all="true">
          <!-- 作用域插槽 data拿到的是每一个子节点的对象 -->
          <!--
      #default === slot-scope
      什么时候用到作用域插槽？父组件中如果想使用子组件中的数据进行自定义内容的渲染 (类似于table 单元格数据渲染)
    -->
          <template #default="{ data }">
            <el-row
              type="flex"
              justify="space-between"
              align="middle"
              style="height: 40px; width: 100%"
            >
              <el-col :span="20">
                <span>{{ data.name }}</span>
              </el-col>
              <el-col :span="4">
                <el-row type="flex" justify="end">
                  <!-- 两个内容 -->
                  <el-col>{{ data.manager }}</el-col>
                  <el-col>
                    <!-- 下拉菜单 element -->
                    <el-dropdown>
                      <span> 操作<i class="el-icon-arrow-down" /> </span>
                      <!-- 下拉菜单 -->
                      <el-dropdown-menu slot="dropdown">
                        <el-dropdown-item
                          @click.native="hAdd(data.id)"
                        >添加子部门</el-dropdown-item>
                        <el-dropdown-item
                          @click.native="hEdit(data.id)"
                        >编辑部门</el-dropdown-item>
                        <el-dropdown-item
                          v-if="data.children.length === 0"
                          @click.native="hDel(data.id)"
                        >删除部门</el-dropdown-item>
                      </el-dropdown-menu>
                    </el-dropdown>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-tree>
      </el-card>
      <el-dialog
        title="添加或编辑"
        :visible.sync="showDialog"
        :close-on-click-modal="false"
        :close-on-press-escape="false"
      >
        <addor-edit
          v-if="showDialog"
          :cur-id="curId"
          :is-edit="isEdit"
          :origin-list="originList"
          @success="hSuccess"
          @close="hClose"
        />
      </el-dialog>
    </div>
  </div>
</template>

<script>
import { getDepartments, delDepartment } from '@/api/departments'
import { tranListToTreeData } from '@/utils'
import AddorEdit from './deptDialog.vue'

export default {
  components: { AddorEdit },
  data() {
    return {
      // 依赖一份树形数据
      list: [],
      // 是否显示弹层
      showDialog: false,
      curId: '',
      isEdit: false, // 是否处于编辑状态
      originList: []
    }
  },
  created() {
    this.loadDepartments()
  },
  methods: {
    hSuccess() {
      // 关闭弹层 -->父组件
      this.showDialog = false
      // 重新渲染数据 ---> 父组件
      this.loadDepartments()
    },
    // 编辑
    hEdit(id) {
      this.isEdit = true
      this.showDialog = true
      this.curId = id
    },
    // 添加
    hAdd(id) {
      this.isEdit = false
      this.showDialog = true
      this.curId = id
    },
    // 取消
    hClose() {
      this.showDialog = false
    },
    // 删除
    hDel(id) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
        .then(async() => {
          try {
            await delDepartment(id)
            // 1. 提示
            this.$message({ type: 'success', message: '删除成功!' })
            // 2. 更新数据
            this.loadDepartments()
          } catch (err) {
            console.log(err)
            this.$message({ type: 'error', message: '删除失败' })
          }
        })
        .catch(() => {})
    },
    // 获取部门列表
    async loadDepartments() {
      try {
        const res = await getDepartments()
        console.log(res)
        // 由于业务中传智教育的pid是:-1，它是最高级的节点
        // shift 从数组头部取出一个元素
        const root = res.data.depts.shift()
        console.log(root)
        this.originList = res.data.depts
          .map(({ code, id, pid, nema }) => { return { code, id, pid, nema } })
        // 用工具函数把 平铺的数组转成 树型数据
        this.list = tranListToTreeData(res.data.depts)
      } catch (err) {
        console.log(err)
      }
    }
  }
}
</script>
